diff --git a/src/Microsoft.DotNet.Build.Tasks/CleanupVSTSAgent.cs b/src/Microsoft.DotNet.Build.Tasks/CleanupVSTSAgent.cs
index dfa6a62c0b..81d36f1f48 100644
--- a/src/Microsoft.DotNet.Build.Tasks/CleanupVSTSAgent.cs
+++ b/src/Microsoft.DotNet.Build.Tasks/CleanupVSTSAgent.cs
@@ -595,7 +595,7 @@ private string[] GetFilesByAttributes(string directory, FileAttributes attribute
             IntPtr hFile = FindFirstFile(directory + "\\*", out findData);
             int error = Marshal.GetLastWin32Error();
 
-            if (hFile.ToInt32() != -1)
+            if (hFile != IntPtr.Zero && hFile != new IntPtr(-1))
             {
                 do
                 {